| 石焕文,尚志远,郭敏.悬臂方薄板振动的辐射声场及竖裂纹对其频谱的影响[J].,2004,23(1):35-41 |
| 悬臂方薄板振动的辐射声场及竖裂纹对其频谱的影响 |
| The sound field of a vibrating cantilever rectangular plate and effect of a perpendicular crack on its spectra |
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| 中文摘要: |
| 在将悬臂板挠度表示为正交多项式之和的基础上,利用瑞利-里兹方法求解了悬臂板的前几阶振动模态频率及挠度.进而利用瑞利积分求解了其自由振动辐射声场的分布规律。用分区技术的瑞利-里兹方法求解了竖裂纹对悬臂板低阶模态频率的影响,并将计算结果与有限元结果作了对照。实验上用小球撞击法测定了含竖裂纹悬臂板辐射声场的频谱,谱成分与有限元结果基本符合。 |
| 英文摘要: |
| Based on the result that the deflection of a rectangular plate is expressible as the summation of orthogonal polynomials, the frequencies and deflections of the low modes of a cantilever rectangular plate are determined by the Rayleigh-Ritz method and then using Rayleigh integration the distribution of the sound field radiated by the freely vibrational plate is presented. The Rayleigh-Ritz method with a sub-sectioning technique is used to obtain the low mode frequencies of the cantilever rectangular plate with a perpendicular crack, and the results are compared with the FEM results. Experimentally the spectra of the sound field are measured using collision-exciting method, and the frequencies are in agreement with FEM results. |
| DOI：10.11684/j.issn.1000-310X.2004.01.008 |
| 中文关键词: 悬臂方薄板 振动 辐射声场 竖裂纹 |
| 英文关键词: Cantilever rectangular Vibration Sound field radiated Perpendicular crack |
| 基金项目: |
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